摘要
近年来,从"限塑令"到"禁塑令"的升级,尤其是塑料包装造成的白色污染问题成为大众关注的焦点,能够进行回收利用的聚丙烯是目前成本效益最高的环境友好型树脂之一,尤其是热成型专用聚丙烯广泛应用于药品包装、食品包装等领域.随着热成型技术的发展,热成型聚丙烯在家用冰箱内衬、汽车结构件、化工容器等大型制品中的应用也日益增多.通过对国内外聚丙烯在热成型技术领域的相关专利申请进行检索、筛选和梳理,从技术方向、区域分布、专利申请趋势、专利主要申请人、核心专利和技术演进路线等多方面,综述了近50年来技术人员对聚丙烯热成型技术改进研究等方面所采用的技术手段;分别分析了原料聚合、聚合后填充改性等5种技术方向的演进路线,总结了聚丙烯材料在热成型领域的应用发展进程,以期为该领域的技术人员提供参考和研究方向.
Abstract
In recent years,the policy upgrading from"plastic restriction order"to"plastic prohibition order",especially the white pollution caused by plastic packaging,has become a focus of public attention.Polypropylene can be recycled,it is one of the most cost-effective environment-friendly resins at present.In particular,special polypropylene for thermoforming is widely used in microwave appliances,food packaging and other fields.With the development of thermoforming technology,the application of polypropylene thermoforming technology in household refrigerator lining,automobile parts,chemical con-tainers and other large products is also increasing.This article analyzes and introduces the patent applications of polypropyl-ene in the field of thermoforming technology in the past 50 years.The patents are searched,screened and sorted in the worldwide patent database from the technical direction,applicant regional distribution,patent application trends,main pa-tent applicants,core patents and technology evolution routes.It summarizes the technical means used by technicians in recent decades for the application improvement of polypropylene materials in thermoforming technology.It also explores evo-lution routes of 5 kinds of patented technologies,such as the polymerization of raw materials,filling modification after poly-merization,etc.In a word,this article summarizes the application development process of polypropylene materials in the field of thermoforming and may provide reference value and research direction for technicians in this field.
维普
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